[Tim Skloss]

[quote=Jake M;681249]

You won't be able to detect anything with a basic multimeter...QUOTE]

Actually you can use a digital voltmeter to read if your gear tooth sensor is working. When all connected and powered up:

Set the DVM to volts DC (VDC).
-connect the black lead to power ground
-check for +5V on the 5/R pad
-check for +12V on the 12/W pad
-check for 0V on the S/W pad (must be close to zero)
-if all checkout OK, then the sensor is likely good and you can go to the next step

Set the DVM to volts AC (VAC)
-connect the black lead to power ground
-connect the red lead to the S/W pad (output signal)
-when you spin a gear within 1mm of the magnetic sensor, you should see an AC voltage rise; it should fall back to zero when you stop moving the gear.
-this works because the sensor board sends out a train of pulses, one for each gear tooth, as the gear is rotated. The DVM interprets them as an AC signal and displays it.

This is a quick-and-dirty way to see if your sensor is working. The best way is to use an oscilloscope.


Set theWhen all connected up, use your DVM to read the voltage on the S (signal output) referenced to ground.